#VU81800 Resource management error in Apache Tomcat - CVE-2023-42795

Vulnerability identifier: #VU81800

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-42795

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to improper management of internal resources within the application when recycling various internal objects. A remote attacker can force Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 8.5.0 - 8.5.93, 9.0.0-M1 - 9.0.80, 10.0.0-M1 - 10.0.27, 10.1.0-M1 - 10.1.13, 11.0.0-M1 - 11.0.0-M11

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External links
https://lists.apache.org/thread/065jfyo583490r9j2v73nhpyxdob56lw
https://github.com/apache/tomcat/commit/d6db22e411307c97ddf78315c15d5889356eca38
https://github.com/apache/tomcat/commit/9375d67106f8df9eb9d7b360b2bef052fe67d3d4
https://github.com/apache/tomcat/commit/44d05d75d696ca10ce251e4e370511e38f20ae75
https://github.com/apache/tomcat/commit/30f8063d7a9b4c43ae4722f5e382a76af1d7a6bf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.